My girl is projectile vomiting😭

I have no idea what brought it on... breast milk, apples/bananas/oats mix food.. we saw family recently but no one was sick?

Sit her down to eat some more solid food, (she had a half a container earlier) she was happy smiley, perfect baby. Give her one bite and she spews instantly...

I grab her up and she pukes 1-2 more times. She’s my first and so I think it’s a food allergy. I’m screaming for my husband, we call for emergency services but they say she looks fine.. )maybe I should’ve calmed down?😫)

Doctor on call for the pediatrician just said to give her pedialyte and limit her breast milk for a few hours...

“Call us if she throws up for a few days in a row”

I am lost and so afraid...